colorDialog颜色拾取

            ColorDialog MyDialog = new ColorDialog();
            // Keeps the user from selecting a custom color.
            MyDialog.AllowFullOpen = false;
            // Allows the user to get help. (The default is false.)
            MyDialog.ShowHelp = true;
            // Sets the initial color select to the current text color.
            MyDialog.Color = textBox1.ForeColor;

            // Update the text box color if the user clicks OK
            if (MyDialog.ShowDialog() == DialogResult.OK)
                textBox1.ForeColor = MyDialog.Color;